#include<stdio.h>
#include<assert.h>

int main()
{	
	char arr[] = { "I want to eat an apple!"};

	int my_strlen( const char*);

	int len = my_strlen(arr);

	printf("%d\n", len);
	return 0;
}
int my_strlen(const char* str)
{
	assert(str);
	int count = 0;
	while (*str)
	{
		count++;
		str++;
	}
	int m = 0x11223344;

	return count;
}

